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角向偏振光束大数值孔径透镜聚焦的偏振开关现象

DOI: 10.11830/ISSN.1000-5013.2012.03.0247, PP. 247-250

Keywords: 双环角向,偏振光束,高数值孔径,偏振开关,Richards-Wolf衍射积分

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Abstract:

利用Richards-Wolf矢量衍射积分模型,推导双环角向偏振光束经过环状高数值孔径透镜聚焦后聚焦区域的偏振特性,并用数值计算分析各相关参数的取值变化对焦面光斑的偏振分布的影响.研究表明:双环角向偏振光束经过环状高数值孔径透镜聚焦以后,其光斑内环的偏振方向发生改变;通过控制各相关参数的取值,可以控制聚焦光斑的偏振分布,形成一种可控的偏振开关.

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